You are ‘Gregg shorthand’. Originally designed to enable people to write faster, it is also very useful for writing things which one does not want other people to read, inasmuch as almost no one knows shorthand any more.

You know how important it is to do things efficiently and on time. You also value your privacy, and (unlike some people) you do not pretend to be friends with just everyone; that would be ridiculous. When you do make friends, you take them seriously, and faithfully keep what they confide in you to yourself. Unfortunately, the work which you do (which is very important, of course) sometimes keeps you away from social activities, and you are often lonely. Your problem is that Gregg shorthand has been obsolete for a long time.